If you go here
http://cryptolife.net/upwg/ you can select the prefix for any Alt coin. I haven't had anything to do with Ethereum - but the command would be
c:\vanitygen\oclvanitygen64 -f work.txt -o dump.txt -X 63 -D 0:0
where work.txt had
nABC
nEFG
nHiJ
nKLM
replacing "n" with your prefix of choice and "63" with the corresponding letter of your prefix.
Some Wallets such as SexCoin have Both R and S so you would select 62 not 64
From the tiny bit I read on the link you provided, it looks like a CPU only generator and has some limitations where as VanityGen can generate for ANY wallet, can use someone's Part Public Key to generate a vanity for someone else, and uses the GPU (much more quicker).
If you post you Part Public Key here, someone can run you off a short Vanity 1demo for your Alt (if you let them know what the prefix is).
